On Mar 12, 2013, at 16:04, Carl Eugen Hoyos wrote:
> I don't think there is any glue code.
But there is a conversion so that MSVC can compile the C 'dialect' ffmpeg uses,
right?
> (Remember the gcc bugs you recently found, a but
^^^ bug?
It's not me who claimed it was a gcc bug, not before I know exactly what goes
wrong where (this is about compiling with auto-vectorisation; a few test cases
fail because of it).
>>> and that might include seek-related code that is
>>> particularly non-optimal.
>
> It could of course be related to the glue code mingw
> uses...
Yes, but in that case one would expect it in all mingw builds.
> Apart from the fact that I still cannot understand why
> building with a cross-compiler in a VM can be easier than
For me, it's the build environment rather than the compiler. The build
utilities evolved in and for unix/linux environments so IMHO everything just
works smoother there (and MSYS doesn't help). Of course the balance may tip the
other way if you start having to maintain a whole slew of libraries ffmpeg
depends on (in case it's impossible to use prebuilt 'native mswin' builds of
said libraries).
BTW, last time I looked (a while ago), it wasn't that evident to find mingw
binaries based on current/recent gcc versions (and capable to compile for 64
bits). With the build script available on zeranoe, it just takes a few hours to
build an up to date cross compiler; it will even download and build the
required dependencies.
> doing a native mingw build: For years, this was one of the
> most often requested "features", probably to allow
> debugging within msvc.
msvc debugging code generated with mingw? If indeed it can do that, it ought to
work just as well if the code was generated by a mingw cross-compiler.
>
> the gcc compiler you installed should work fine, no reason
> to setup Ubuntu to compile for win32.
I kind of expect this to be available in a pre-configured image.
R.
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